﻿//
// Copyright (c) 2008-2010 Wouter Demuynck
//
// Permission is hereby granted, free of charge, to any person obtaining a copy of this
// software and associated documentation files (the "Software"), to deal in the Software
// without restriction, including without limitation the rights to use, copy, modify, merge,
// publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons
// to whom the Software is furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all copies or
// substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
// INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
// PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE
// FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
// ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//

using System;
using Microsoft.VisualStudio.TestTools.UnitTesting;

namespace BuildTools.UnitTests
{
    [TestClass]
    public sealed class DateTimeExtensionsTests
    {
        [TestMethod]
        public void YearsSinceTest()
        {
            Assert.AreEqual(0, DateTime.UtcNow.YearsSince(DateTime.Today));
            Assert.AreEqual(0, DateTime.UtcNow.YearsSince(DateTime.UtcNow));

            for (int i = 0; i < 4096; i++)
            {
                Assert.AreEqual(i, DateTime.Today.AddYears(i).YearsSince(DateTime.UtcNow));
            }
        }

        [TestMethod]
        public void MonthsSinceTest()
        {
            Assert.AreEqual(0, DateTime.UtcNow.MonthsSince(DateTime.Today));
            Assert.AreEqual(0, DateTime.UtcNow.MonthsSince(DateTime.UtcNow));

            for (int i = 0; i < 4096; i++)
            {
                Assert.AreEqual(i, DateTime.Today.AddMonths(i).MonthsSince(DateTime.UtcNow));
            }
        }

        [TestMethod]
        public void DaysSinceTest()
        {
            Assert.AreEqual(0, DateTime.UtcNow.DaysSince(DateTime.Today));
            Assert.AreEqual(0, DateTime.UtcNow.DaysSince(DateTime.UtcNow));

            for (int i = 0; i < 4096; i++)
            {
                Assert.AreEqual(i, DateTime.Today.AddDays(i).DaysSince(DateTime.UtcNow));
            }
        }
    }
}
